40421023031 has 4 divisors (see below), whose sum is σ = 40482360600. Its totient is φ = 40359685464.

The previous prime is 40421023021. The next prime is 40421023043. The reversal of 40421023031 is 13032012404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40421023031 is a prime.

It is a super-2 number, since 2×40421023031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40421022994 and 40421023012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40421023021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30667796 + ... + 30669113.

It is an arithmetic number, because the mean of its divisors is an integer number (10120590150).

Almost surely, 2^40421023031 is an apocalyptic number.

40421023031 is a deficient number, since it is larger than the sum of its proper divisors (61337569).

40421023031 is an equidigital number, since it uses as much as digits as its factorization.

40421023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61337568.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 40421023031 its reverse (13032012404), we get a palindrome (53453035435).

The spelling of 40421023031 in words is "forty billion, four hundred twenty-one million, twenty-three thousand, thirty-one".